formbook | c041a06efb25eff8fe0ef8ec1b43b3828ad4c3489827add8e156d7a2ec2a786e

General

Target

MV._KHARIS_PEAGSUS_V.SN2216.js
Size

1.1MB
MD5

f6291775008f71c57a810fb5803328d7
SHA1

a8135b5c3e14002e35188f3cc5dd9e00dff21552
SHA256

c041a06efb25eff8fe0ef8ec1b43b3828ad4c3489827add8e156d7a2ec2a786e
SHA512

145606f3c434c5bdc2db38cf18ffdb359454cd973ff11158433a8955a845499f3a9b99f95664767e86efb75268cdea9f586fb7d9ebb64ef22c29e6fb5afed291
SSDEEP

12288:GtHYDeDuDLzi5Z96Svb/nYsv/ysXEizfPxuGYjSHOL08+t2gI5tx/gHtBbtj97eG:YaSDnYsv/ysXEizf5uquL4U96RN

Score

10^/10

formbook vjw0rm ermr rat spyware stealer trojan worm

Malware Config

Extracted

Family

formbook

Campaign

ermr

Decoy

ErOK6LFCgNIAlQmH54oaYOL/CN29Z78=

qNSdDhu/PT/1fgafDagiCSZH1SY=

wLpPOAkYS8EABl3pHGc4hNT/Q1sHBrU=

jSxRvptHkeTGl7PT0SEmaZmjqzanuA==

b91oL+2wCcpyhnd6yvF6Pg==

mr81yp1/qqZX

hy7Xsz/PU/LWHMcGL4UYJx9n3A==

KlwrHt1gouPaXaWhoQ==

ng8M320IRJL9Ptw=

8GQbOXuaWxvKnNM=

XndOL7E5sNpVUNty4d/a

rryPBBC8PybYb+2h2MF3FHGL

kEoeyERSVCYO0g==

5/P+SBDby5hO

1fYXc30/h9W7iO17

34X+YKR+wRFE

8ir/X2MlVByh5lQ1ow8=

u9ikm2UMZ7J7hpCYow==

FLI+c3clp1BNDjVAfvC2Dnw=

t21Erq8/r09wAzAJTAH3Ng==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 16 IoCs

flow	pid	Process
4	836	wscript.exe
5	836	wscript.exe
8	836	wscript.exe
13	836	wscript.exe
16	836	wscript.exe
19	836	wscript.exe
23	836	wscript.exe
24	836	wscript.exe
25	836	wscript.exe
32	836	wscript.exe
36	836	wscript.exe
42	836	wscript.exe
46	836	wscript.exe
50	836	wscript.exe
51	836	wscript.exe
58	836	wscript.exe

Executes dropped EXE 1 IoCs

pid	Process
1584	bin (1).exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Control Panel\International\Geo\Nation	bin (1).exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\UdTkVakXFj.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\UdTkVakXFj.js	wscript.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1584 set thread context of 1388	1584	bin (1).exe	10
PID 484 set thread context of 1388	484	help.exe	10

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
1584	bin (1).exe
1584	bin (1).exe
1584	bin (1).exe
1584	bin (1).exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe
484	help.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1388	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1584	bin (1).exe
1584	bin (1).exe
1584	bin (1).exe
484	help.exe
484	help.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1584	bin (1).exe
Token: SeDebugPrivilege	484	help.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1388	Explorer.EXE
1388	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1388	Explorer.EXE
1388	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 836	1768	wscript.exe	27
PID 1768 wrote to memory of 836	1768	wscript.exe	27
PID 1768 wrote to memory of 836	1768	wscript.exe	27
PID 1768 wrote to memory of 1584	1768	wscript.exe	28
PID 1768 wrote to memory of 1584	1768	wscript.exe	28
PID 1768 wrote to memory of 1584	1768	wscript.exe	28
PID 1768 wrote to memory of 1584	1768	wscript.exe	28
PID 1388 wrote to memory of 484	1388	Explorer.EXE	30
PID 1388 wrote to memory of 484	1388	Explorer.EXE	30
PID 1388 wrote to memory of 484	1388	Explorer.EXE	30
PID 1388 wrote to memory of 484	1388	Explorer.EXE	30
PID 484 wrote to memory of 556	484	help.exe	31
PID 484 wrote to memory of 556	484	help.exe	31
PID 484 wrote to memory of 556	484	help.exe	31
PID 484 wrote to memory of 556	484	help.exe	31

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\system32\wscript.exe
  wscript.exe C:\Users\Admin\AppData\Local\Temp\MV._KHARIS_PEAGSUS_V.SN2216.js
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\System32\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\UdTkVakXFj.js"
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    PID:836
- - C:\Users\Admin\AppData\Local\Temp\bin (1).exe
    "C:\Users\Admin\AppData\Local\Temp\bin (1).exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1584
- C:\Windows\SysWOW64\help.exe
  "C:\Windows\SysWOW64\help.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:484
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\bin (1).exe"
    3⤵
    PID:556

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\bin (1).exe

Filesize
177KB

MD5
847f96edff4362a11a17a55a0f777394

SHA1
213b8bd653acaf9749af503b936fde0d9effdff4

SHA256
b7f9d8c856f2a427668235d49710a8ac3caa7bcaf5e317a064205127df431061

SHA512
6aed480e2aca2414e47d44e87ddce59da4809de9629c5fbc9c3e3bd1665a173efec1f13a3275d95ffcc63394b854caf9d2cd7e80af2868a08d0f8885b5470227

Download Submit
C:\Users\Admin\AppData\Local\Temp\bin (1).exe

Filesize
177KB

MD5
847f96edff4362a11a17a55a0f777394

SHA1
213b8bd653acaf9749af503b936fde0d9effdff4

SHA256
b7f9d8c856f2a427668235d49710a8ac3caa7bcaf5e317a064205127df431061

SHA512
6aed480e2aca2414e47d44e87ddce59da4809de9629c5fbc9c3e3bd1665a173efec1f13a3275d95ffcc63394b854caf9d2cd7e80af2868a08d0f8885b5470227

Download Submit
C:\Users\Admin\AppData\Roaming\UdTkVakXFj.js

Filesize
299KB

MD5
4bf088310263e59715d08d30a5cd0997

SHA1
098a60960d3c74d31d0c67e9eb0e68d0bd19e4b4

SHA256
5aea8986b2b2f456f9c8a167872ee333e62b719c26590011da3518fd0d282570

SHA512
c66090e07a76c52521de51837a7f483fc0158f8bb29959bdc83e4d53d81baf3bf3284aaad50d18d4d43cf15cd834c5d4a01013271f6550da9fdc69cc00d99672

Download Submit
memory/484-63-0x00000000009B0000-0x00000000009B6000-memory.dmp

Filesize
24KB

Download
memory/484-72-0x0000000076961000-0x0000000076963000-memory.dmp

Filesize
8KB

Download
memory/484-70-0x0000000000080000-0x00000000000AD000-memory.dmp

Filesize
180KB

Download
memory/484-68-0x00000000004D0000-0x0000000000560000-memory.dmp

Filesize
576KB

Download
memory/484-67-0x00000000009C0000-0x0000000000CC3000-memory.dmp

Filesize
3.0MB

Download
memory/484-64-0x0000000000080000-0x00000000000AD000-memory.dmp

Filesize
180KB

Download
memory/836-58-0x000007FEFC591000-0x000007FEFC593000-memory.dmp

Filesize
8KB

Download
memory/1388-61-0x0000000006B50000-0x0000000006CD3000-memory.dmp

Filesize
1.5MB

Download
memory/1388-69-0x00000000071E0000-0x0000000007355000-memory.dmp

Filesize
1.5MB

Download
memory/1388-71-0x00000000071E0000-0x0000000007355000-memory.dmp

Filesize
1.5MB

Download
memory/1584-60-0x0000000000190000-0x00000000001A1000-memory.dmp

Filesize
68KB

Download
memory/1584-59-0x0000000000700000-0x0000000000A03000-memory.dmp

Filesize
3.0MB

Download

Analysis

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